Why is Lake Michigan's water level so low?

Why is Lake Michigan's water level so low?

http://www.wzzm13.com/video/2178871268001/1/Why-is-Lake-Michigans-water-level-so-lowhttp://bcdownload.gannett.edgesuite.net/wzzm/34295214001/34295214001_2178927597001_th-51256902e4b0b14bff5d7619-590065944001.jpg?pubId=34295214001Why is Lake Michigan's water level so low?Why is Lake Michigan's water level so low?WZZMLakeshoreNews01:59